similar to this event that was held a few weeks ago ?
http://www.ukendurancemasters.com/
The format for that event was that each team would have there own car minus an engine . When the horn sounded the 6 hour race began ....Each team had to get their brand new motor (hobao 21 control engine supplied to each team FOC ) and 2 gallons of Byrons and then install the clutch and get it installed into the car and then complete as many laps as possible in 6 hours with drivers doing 30 minute stints between team mates .